[SCSI] be2iscsi: Moving to pci_pools v3
This patch contains changes to use pci_pools for iscsi hdr
instead of pci_alloc_consistent. Here we alloc and free to pool
for every IO
v3:
- Remove cleanup loop in beiscsi_session_destroy
- Fixup for allocation failure handling in beiscsi_alloc_pdu
- Removed unused variable in beiscsi_session_destroy.
[jejb: fix up pci_pool_alloc address sizing problem]
Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index f18e643..2fd2544 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -45,14 +45,9 @@
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_cls_session *cls_session;
struct beiscsi_hba *phba;
- struct iscsi_task *task;
struct iscsi_session *sess;
struct beiscsi_session *beiscsi_sess;
struct beiscsi_io_task *io_task;
- unsigned int max_size, num_cmd;
- dma_addr_t bus_add;
- u64 pa_addr;
- void *vaddr;
SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");
@@ -80,20 +75,18 @@
if (!cls_session)
return NULL;
sess = cls_session->dd_data;
- max_size = ALIGN(sizeof(struct be_cmd_bhs), 64) * sess->cmds_max;
- vaddr = pci_alloc_consistent(phba->pcidev, max_size, &bus_add);
- pa_addr = (__u64) bus_add;
+ beiscsi_sess = sess->dd_data;
+ beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool",
+ phba->pcidev,
+ sizeof(struct be_cmd_bhs),
+ 64, 0);
+ if (!beiscsi_sess->bhs_pool)
+ goto destroy_sess;
- for (num_cmd = 0; num_cmd < sess->cmds_max; num_cmd++) {
- task = sess->cmds[num_cmd];
- io_task = task->dd_data;
- io_task->cmd_bhs = vaddr;
- io_task->bhs_pa.u.a64.address = pa_addr;
- io_task->alloc_size = max_size;
- vaddr += ALIGN(sizeof(struct be_cmd_bhs), 64);
- pa_addr += ALIGN(sizeof(struct be_cmd_bhs), 64);
- }
return cls_session;
+destroy_sess:
+ iscsi_session_teardown(cls_session);
+ return NULL;
}
/**
@@ -105,18 +98,10 @@
*/
void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
{
- struct iscsi_task *task;
- struct beiscsi_io_task *io_task;
struct iscsi_session *sess = cls_session->dd_data;
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct beiscsi_hba *phba = iscsi_host_priv(shost);
+ struct beiscsi_session *beiscsi_sess = sess->dd_data;
- task = sess->cmds[0];
- io_task = task->dd_data;
- pci_free_consistent(phba->pcidev,
- io_task->alloc_size,
- io_task->cmd_bhs,
- io_task->bhs_pa.u.a64.address);
+ pci_pool_destroy(beiscsi_sess->bhs_pool);
iscsi_session_teardown(cls_session);
}
@@ -133,6 +118,8 @@
struct iscsi_cls_conn *cls_conn;
struct beiscsi_conn *beiscsi_conn;
struct iscsi_conn *conn;
+ struct iscsi_session *sess;
+ struct beiscsi_session *beiscsi_sess;
SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
"from iscsi layer=%d\n", cid);
@@ -148,6 +135,9 @@
beiscsi_conn->ep = NULL;
beiscsi_conn->phba = phba;
beiscsi_conn->conn = conn;
+ sess = cls_session->dd_data;
+ beiscsi_sess = sess->dd_data;
+ beiscsi_conn->beiscsi_sess = beiscsi_sess;
return cls_conn;
}
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index d520fe8..4f1aca3 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -2880,7 +2880,16 @@
struct hwi_wrb_context *pwrb_context;
struct hwi_controller *phwi_ctrlr;
itt_t itt;
+ struct beiscsi_session *beiscsi_sess = beiscsi_conn->beiscsi_sess;
+ dma_addr_t paddr;
+ io_task->cmd_bhs = pci_pool_alloc(beiscsi_sess->bhs_pool,
+ GFP_KERNEL, &paddr);
+
+ if (!io_task->cmd_bhs)
+ return -ENOMEM;
+
+ io_task->bhs_pa.u.a64.address = paddr;
io_task->pwrb_handle = alloc_wrb_handle(phba,
beiscsi_conn->beiscsi_conn_cid,
task->itt);
@@ -2894,17 +2903,9 @@
spin_lock(&phba->io_sgl_lock);
io_task->psgl_handle = alloc_io_sgl_handle(phba);
spin_unlock(&phba->io_sgl_lock);
- if (!io_task->psgl_handle) {
- phwi_ctrlr = phba->phwi_ctrlr;
- pwrb_context = &phwi_ctrlr->wrb_context
- [beiscsi_conn->beiscsi_conn_cid];
- free_wrb_handle(phba, pwrb_context,
- io_task->pwrb_handle);
- io_task->pwrb_handle = NULL;
- SE_DEBUG(DBG_LVL_1,
- "Alloc of SGL_ICD Failed \n");
- return -ENOMEM;
- }
+ if (!io_task->psgl_handle)
+ goto free_hndls;
+
} else {
io_task->scsi_cmnd = NULL;
if ((task->hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGIN) {
@@ -2913,18 +2914,9 @@
io_task->psgl_handle = (struct sgl_handle *)
alloc_mgmt_sgl_handle(phba);
spin_unlock(&phba->mgmt_sgl_lock);
- if (!io_task->psgl_handle) {
- phwi_ctrlr = phba->phwi_ctrlr;
- pwrb_context =
- &phwi_ctrlr->wrb_context
- [beiscsi_conn->beiscsi_conn_cid];
- free_wrb_handle(phba, pwrb_context,
- io_task->pwrb_handle);
- io_task->pwrb_handle = NULL;
- SE_DEBUG(DBG_LVL_1, "Alloc of "
- "MGMT_SGL_ICD Failed \n");
- return -ENOMEM;
- }
+ if (!io_task->psgl_handle)
+ goto free_hndls;
+
beiscsi_conn->login_in_progress = 1;
beiscsi_conn->plogin_sgl_handle =
io_task->psgl_handle;
@@ -2936,23 +2928,24 @@
spin_lock(&phba->mgmt_sgl_lock);
io_task->psgl_handle = alloc_mgmt_sgl_handle(phba);
spin_unlock(&phba->mgmt_sgl_lock);
- if (!io_task->psgl_handle) {
- phwi_ctrlr = phba->phwi_ctrlr;
- pwrb_context = &phwi_ctrlr->wrb_context
- [beiscsi_conn->beiscsi_conn_cid];
- free_wrb_handle(phba, pwrb_context,
- io_task->pwrb_handle);
- io_task->pwrb_handle = NULL;
- SE_DEBUG(DBG_LVL_1, "Alloc of "
- "MGMT_SGL_ICD Failed \n");
- return -ENOMEM;
- }
+ if (!io_task->psgl_handle)
+ goto free_hndls;
}
}
itt = (itt_t) cpu_to_be32(((unsigned int)task->itt << 16) |
(unsigned int)(io_task->psgl_handle->sgl_index));
io_task->cmd_bhs->iscsi_hdr.itt = itt;
return 0;
+
+free_hndls:
+ phwi_ctrlr = phba->phwi_ctrlr;
+ pwrb_context = &phwi_ctrlr->wrb_context[beiscsi_conn->beiscsi_conn_cid];
+ free_wrb_handle(phba, pwrb_context, io_task->pwrb_handle);
+ io_task->pwrb_handle = NULL;
+ pci_pool_free(beiscsi_sess->bhs_pool, io_task->cmd_bhs,
+ io_task->bhs_pa.u.a64.address);
+ SE_DEBUG(DBG_LVL_1, "Alloc of SGL_ICD Failed \n");
+ return -ENOMEM;
}
static void beiscsi_cleanup_task(struct iscsi_task *task)
@@ -2961,6 +2954,7 @@
struct iscsi_conn *conn = task->conn;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct beiscsi_hba *phba = beiscsi_conn->phba;
+ struct beiscsi_session *beiscsi_sess = beiscsi_conn->beiscsi_sess;
struct hwi_wrb_context *pwrb_context;
struct hwi_controller *phwi_ctrlr;
@@ -2971,6 +2965,11 @@
io_task->pwrb_handle = NULL;
}
+ if (io_task->cmd_bhs) {
+ pci_pool_free(beiscsi_sess->bhs_pool, io_task->cmd_bhs,
+ io_task->bhs_pa.u.a64.address);
+ }
+
if (task->sc) {
if (io_task->psgl_handle) {
spin_lock(&phba->io_sgl_lock);
@@ -3003,7 +3002,6 @@
unsigned int doorbell = 0;
pwrb = io_task->pwrb_handle->pwrb;
-
io_task->cmd_bhs->iscsi_hdr.exp_statsn = 0;
io_task->bhs_len = sizeof(struct be_cmd_bhs);
@@ -3020,7 +3018,6 @@
&io_task->cmd_bhs->iscsi_data_pdu, 1);
AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb, INI_WR_CMD);
AMAP_SET_BITS(struct amap_iscsi_wrb, dsp, pwrb, 1);
-
} else {
SE_DEBUG(DBG_LVL_4, "READ Command \t");
AMAP_SET_BITS(struct amap_iscsi_wrb, type, pwrb, INI_RD_CMD);
diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h
index 387e363..53c9b70 100644
--- a/drivers/scsi/be2iscsi/be_main.h
+++ b/drivers/scsi/be2iscsi/be_main.h
@@ -391,7 +391,6 @@
unsigned short cid;
unsigned short header_len;
- unsigned int alloc_size;
struct be_cmd_bhs *cmd_bhs;
struct be_bus_address bhs_pa;
unsigned short bhs_len;
